Matrix properties
number of rows	4,875
number of columns	4,875
nonzeros	105,339
structural full rank?	yes
structural rank	4,875
# of blocks from dmperm	3
# strongly connected comp.	3
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	R. Grimes
editor	T. Davis
date	1995
kind	materials problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	327,024	327,360	327,024
Cholesky flop count	3.1e+07	2.9e+07	3.1e+07
nnz(L+U), no partial pivoting	649,173	649,845	649,173
nnz(V) for QR, upper bound nnz(L) for LU	310,386	425,930	409,041
nnz(R) for QR, upper bound nnz(U) for LU	596,277	795,682	777,561

Maintained by Tim Davis, last updated 04-May-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.